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Calculations of forming limit diagrams
Metallurgical Transactions A, 1990The right-hand side of the forming limit diagram (FLD) was calculated using a Marciniak-Kuczynski analysis with a nonquadratic anisotropic yield criterion. Effects of changing the strain-hardening exponent, n, strain-rate exponent, m, strain ratio, R, stress exponent in the anisotropic yield criterion, a, and the inhomogeneity factor, f, were explored.
Alejandro Graf, William F. Hosford
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Forming limit diagram of perforated sheet
Scripta Metallurgica et Materialia, 1995The proper design and manufacture of tube sheets in heat exchangers and shadow masks in color picture tubes require the characterization of the deformation behavior of perforated sheets containing a large number of holes. The limit or failure strains in sheet metal forming are best represented by a forming limit curve (FLC) which indicates the onset of
Seung Chul Baik +2 more
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The bending dependency of forming limit diagrams
International Journal of Material Forming, 2018The forming limit diagram (FLD) is commonly used in the forming industry to predict localized necking in sheet metals. However, experimental and mathematical determination of forming limit curves is based on in-plane deformation without taking a bending component into account.
Felix M. Neuhauser +4 more
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Forming limit diagrams: a micromechanical approach
International Journal of Mechanical Sciences, 2000zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gänser, Hans Peter +2 more
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Torsional Softening and the Forming Limit Diagram
SAE Technical Paper Series, 1996<div class="htmlview paragraph">Torsional softening arising from the deformation-induced anisotropy of texture and dislocation substructure formation affects various regions of the forming limit diagram. The third invariant of overstress, <img class="article-image inline" src="960599_fig0001.jpg" alt=""/> is included in the kinematic and ...
Mark F. Horstemeyer +2 more
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On forming limit stress diagram analysis
International Journal of Solids and Structures, 2005zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wu, P. D. +5 more
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Non-Traditional Forming Limit Diagrams for Incremental Forming
Advanced Materials Research, 2005Although not standard, Forming Limit Diagrams, FLD’s, are used throughout the automotive industry as a preliminary tool to determine if a sheet metal forming process is capable of forming a good part. FLD’s show a limited range of strains on the diagram; typically the range is 0 to 1 on the major strain axis.
J. Jeswiet, David J. Young, M. Ham
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AIP Conference Proceedings, 2011
In this paper experimental and theoretical FLD and FLSD of AA3105 are investigated. For this purpose, the forming limit diagram of Aluminum alloy 3105 using out‐of‐plane test is evaluated experimentally. Also, base of emphasis of forming limit stress diagrams and using plasticity equations, the stress limits resulted from strain limits and then forming
Mehdi. Safari +6 more
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In this paper experimental and theoretical FLD and FLSD of AA3105 are investigated. For this purpose, the forming limit diagram of Aluminum alloy 3105 using out‐of‐plane test is evaluated experimentally. Also, base of emphasis of forming limit stress diagrams and using plasticity equations, the stress limits resulted from strain limits and then forming
Mehdi. Safari +6 more
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Stochastic simulations of forming limit diagrams
AIP Conference Proceedings, 2007Finite element simulations of square patches of material with spatial thickness variations subjected to a set of proportional strain paths have been performed. Localization is detected when the thickness increment in one element is much larger then the average thickness increment of the whole patch.
O. Fyllingen +2 more
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Analysis of forming limit diagram for superplastic materials
The International Journal of Advanced Manufacturing Technology, 2005Superplastic materials show very large tensile elongation (in excess of 5000%) even if they are lowly stressed. Superplastic forming is carried out at high temperatures and relatively low strain rates. In order to control the industrial forming processes, the difficulty in predicting the failure strain of superplastic materials is main problem faced by
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